Discussion Forum

Hello.

I'm pretty new in COMSOL and I've tried to simulate the electric field distribution between two electrodes in stationary solution.

There is some dielectric material between two electrodes and let's assumed that the whole system is inside the vacuum.

This should be pretty simple simulation and the followings are the list of the physics I included.

1. Charge conservation (for all domains)
2. Zero charge (for all boundaries except for the electrodes)
3. Initial values (for all domains as electric potential V = 0)
4. Electric potential (for two electrodes boundaries)

Simulation looks finely run but I'm wondering there might be additional physics I have to apply like the
space charge density and ground or etc.

In some tutorial the space charge density and ground are applied to very similar simulation but I didn't see the reason why I have to use such physics. The simulation runs without them.

For ground Should I apply it to dielectric material? Is it necessary?

And what does initial values play? I'm not talking about time-varying solution and I thought It is not necessary but can't remove it. It looks default.

Please help me clarify my vision toward the right simulation.